Apple tree named &#39;B. Thorne McIntosh&#39;

ABSTRACT

A new and distinct variety of Mcintosh apple tree, ‘Apple Tree named B. Thome Mcintosh,’ originating as a limb mutation of the  Malus domestica  variety of ‘Starling’ (U.S. Plant Pat. No. 7,167). This new variety is unique from its parent and other McIntosh cultivars in the greenish coloration of its flesh and the red coloration of the blossom and the leaf petiole.

DESCRIPTION OF RELATED APPLICATIONS

The new variety, ‘B. Thome Mcintosh’ differs from its parent and other McIntosh varieties in the following characteristics:

-   -   A. The fruit of the new variety ripens with its parent,         ‘Starling’ (U.S. Plant Pat. No. 7,167) and ‘Bull’ (U.S. Plant         Pat. No. 12,900). It ripens 10 to 15 days ahead of ‘Pioneer Mac’         (U.S. Plant Pat. No. 7,002), ‘Hartenmac NS 219’ (U.S. Plant Pat.         No. 10,770), ‘Chick’ (U.S. Plant Pat. No. 5,508) and ‘Dewar’         (U.S. Plant Pat. No. 4,383). It ripens 4 to 6 weeks ahead of         ‘Miriela’ (U.S. Plant Pat. No. 12,863).     -   B. The new variety differs from its parent, ‘Starling’ (U.S.         Plant Pat. No. 7,167) and ‘Bull’ (U.S. Plant Pat. No. 12,900) in         the color of its flesh and the red coloration of the blossom and         the leaf petiole.

LATIN NAME OF THE GENUS AND SPECIES OF THE PLANT CLAIMED

Malus domestica

VARIETY DENOMINATION

‘B. Thome McIntosh.’

BACKGROUND OF THE INVENTION

A new and distinct variety of McIntosh apple tree originating as a limb mutation of the Malus domestica variety of ‘Starling’ (U.S. Plant Pat. No. 7,167), hereinafter referred to as the ‘B. Thome McIntosh’. This new sport is unique from its parent because the fruit starts coloring 80 days earlier as a full red blush. The color finishes to a virtually 100% solid, bright red blush with flesh that is slightly greener than the parent and with a leaf petiole and blossom with prominent red coloration.

SUMMARY OF THE INVENTION

This new and distinct variety of McIntosh apple tree was discovered in 1999 as a limb mutation of ‘Starling’ (U.S. Plant Pat. No. 7,167), in an orchard planted in 1985 near Comstock Park, Mich. The new variety was noticed because the fruit started coloring the in mid June, 6 to 8 weeks ahead of all other ‘Starling’(U.S. Plant Pat. No. 7,167) fruit in the orchard.

Observations during the next two seasons confirmed the that the fruit colored with a solid, bright red blush with no striping as opposed to ‘Starling’(U.S. Plant Pat. No. 7,167), which colors with a distinct stripe. The mature fruit of the new variety finishes to a 100% solid, intense bright red color. The new variety also exhibits a prominent red coloration of the petiole and the blossom.

In August of 2000, buds were taken from the original limb and 100 trees for further testing were produced by cleft grafting onto existing apple trees. In 2001, buds were taken from the original limb and reproduced by chip budding into 116 trees on M9 (NIC 29) rootstock in Brentwood, Calif. The new variety has remained true to the description herein contained. The new variety has not been grown on its own root.

DESCRIPTION OF THE DRAWINGS

The accompanying photographs show typical specimens of the new variety as depicted in color as nearly true as is reasonably possible in color illustrations of this character. These specimens were obtained in Comstock Park, Kent County, Mich., 49345.

FIG. 1 illustrates the fruits and foliage of the new variety at maturity.

FIG. 2 illustrates a section of the fruit and the foliage of the new variety.

FIG. 3 illustrates blossoms of the new variety.

DETAILED BOTANICAL DESCRIPTION

A detailed description of the ‘B. Thome McIntosh’ cultivar follows using The Royal Horticultural Society of London Colour Chart, 1986 edition, for color identification except where general color terms are sufficient.

-   Parentage: A limb mutation of ‘Starling’, (U.S. Plant Pat. No.     7,167). Locality of the original discovery and observations is 1600     Eight Mile Road, Comstock Park, Mich. 49321. -   Tree:     -   -   Age.—4 years.         -   Size.—Large, height 2.5 m, width 1 m.         -   Vigor.—Vigorous, yearly growth averages 1 m.         -   Density.—Medium.         -   Form.—Upright, spreading.         -   Production.—Very productive, averaging 800 bushels per acre.         -   Growth type.—Non-spur.         -   Bearing.—Annual. -   Trunk:     -   -   Size.—13 cm in diameter at 90 cm above ground level.         -   Surface.—Smooth.         -   Bark color.—Grey Group 201 B.         -   Lenticels.—Length 1.5 cm, width 0.5 cm.         -   Lenticel color.—Grayed White 156 D.         -   Lenticel density.—2 per cm². -   Branches:     -   -   3 year old branch.—25 mm in diameter, color Grayed Orange             175 A, angle to trunk 30° to 45°.         -   2 year old branch.—8 to 10 mm in diameter, length 25 to 25             cm, color Grayed Orange 175 A, angle to 3^(rd) year branch             30° to 50°.         -   1 year old branch.—5 to 8 mm in diameter, length 30 to 40             cm, color Grayed Purple 187 A; lenticels 0.1 mm in diameter,             round, color Grayed Yellow 161 A, angle to 2^(nd) year             branch 30° to 50°. -   Leaves:     -   -   Size.—length 95 mm, width 60 mm.         -   Texture.—leathery, crisp.         -   Form.—broadly ovate.         -   Base.—bluntly pointed.         -   Apex.—rounded.         -   Adaxial surface pubescence.—none.         -   Abaxial pubescence.—very fine.         -   Adaxial surface color.—Yellow Green 147 A.         -   Abaxial surface color.—Yellow Green 147 C.         -   Venation.—pinnate, 10-12 veins, mainly alternate, color             Yellow Green 147 C with Grayed Purple 185 B toward mid-vein.         -   Mid-vein.—strong coloration of Grayed Purple 185 B extending             from base of leaf to within 10 mm of leaf tip.         -   Margin.—serrate.         -   Leaf glands.—absent.         -   Petiole length.—33 mm.         -   Petiole width.—2 mm.         -   Petiole abaxial color.—Grayed Purple 185 B to Grayed Purple             187 A toward base and abscission layer.         -   Petiole groove.—none observed.         -   Stipules.—very fine, at the base of the petiole on almost             all leaves.         -   Stipule length.—7 mm.         -   Stipule width.—1.5 mm.         -   Stipule color.—Yellow Green 147 C. -   Leaf buds:     -   -   Length.—5 mm.         -   Width.—4 mm.         -   Color.—Grayed Purple 187 A.         -   Placement on branch.—tightly applied to the branch.         -   Internode distance.—35 mm. -   Spurs: Present on 2^(nd) year and older wood.     -   -   Length.—12 to 15 mm.         -   Width.—6 to 8 mm.         -   Color.—Grayed Purple 187 A.         -   Bloom period.—early season bloom, approximately April 12 to             19 in Comstock Park, Mich. -   Presentation: Very showy -   Fragrance: Very fragrant -   Fertility: Fertile, will pollinate other early blooming varieties     such as Idared or Spartan. -   Pollination requirements: Requires pollen from other early blooming,     fertile varieties such as Spartan (an unpatented selection), Idared     (an unpatented selection) or Manchurian Crabapple (an unpatented     selection). -   Pollen: Abundant -   Flowers at popcorn stage:     -   -   Pedicle.—length 18 to 22 mm, diameter 2 mm.         -   Pedicel color.—Green 138 B.         -   Bud.—length 9 mm, width 7 to 8 mm.         -   Bud color.—White 155 D with a blush of Purple Violet 80 D             and banding of Purple Violet 80 D on the outer edges of the             petals. -   Flowers at full bloom:     -   -   Corolla diameter.—45 to 55 mm when fully open.         -   Numbers of flowers per cluster.—3 to 5.         -   Petals.—Arrangement: generally overlapping Color: White 155             D with a distinct banding on the outer edges of Purple             Violet 80 D on both upper and lower surfaces. Petal Veins:             White 155 D on 50% of petals, remaining petals showing             distinct vein coloration of Purple Violet 80 D extending             from the base of the petal to the outer edges, merging into             the banding of Purple Violet 80 D. Shape: broadly ovate,             base rounded to abruptly cuneate at junction with             receptacle, apex very rounded. Entire petal is cupped with             basin 5 mm deep basin from the edge to the center of the             petal. Margin: somewhat ruffled with occasional notching at             the apex. Size: length 23 to 25 mm, width 18 to 20 mm.             Texture: firm.         -   Pedicel.—length 25 to 27 mm, width 2 mm, color Green 138 B.         -   Sepals.—5 in number, wedge shaped, sharply pointed, length 5             mm, width 5 mm, color Green 138 B.         -   Filaments.—length 8 to 10 mm, width 0.3 mm, color Purple             Violet 80 C at base blending to White 155 D at junction with             anther.         -   Anthers.—length 2 mm, width 1 mm, color Grayed Orange 166 D.         -   Pistil.—held slightly lower than anthers in a majority of             blossoms.         -   Ovary.—length, 4 mm, width 1.5 mm, pubescent, color Green             White 157 D.         -   Stigma.—width 1 mm, pubescent, color Green White 157 D.         -   Style.—length 3 mm, width 1 mm, color Green White 157 D. -   Fruit:     -   -   Maturity when described.—firm ripe.         -   Date of picking.—September 1, in Comstock Park, Kent County,             Mich., generally harvested in one picking.         -   Size.—Axial diameter 80 to 90 mm, transverse diameter 80 to             90 mm.         -   Form.—Uniform, symmetrical, regular, round.         -   Average weight.—200 to 220 g.         -   Cavity.—Obtuse, shallow, depth 26 mm, width 35 mm.         -   Basin.—Symmetrical, abrupt at base, wide, depth, 12 mm,             width 30 mm.         -   Calyx.—Closed, segments persistent, erect, outer and inner             surfaces pubescent. -   Skin:     -   -   Thickness.—Thin.         -   Texture.—Very smooth, glossy with medium cuticle wax.         -   Tendency to crack.—None.         -   Lenticels.—white, inconspicuous, small, few in number.         -   Color.—Solid blush 90% to 100% Red Group 59 A, with no             striping.         -   Ground color.—Grayed Yellow 160 B with Yellow Green 145 A. -   Flesh:     -   -   Aroma.—sweet, aromatic.         -   Color.—Green White 157 B.         -   Texture.—firm, tender, fine, crisp.         -   Eating quality.—best. -   Core:     -   -   Bundle area.—medium to ovate, cordate, symmetrical at base.         -   Bundle.—inconspicuous, green, alternate above stamens.         -   Carpillary area.—distinct, medium size.         -   Calyx tube.—slightly urn shaped, open.         -   Depth of tube to shoulder.—16 mm.         -   Styles.—Distinct, pubescent.         -   Stamens.—One distinct whorl, small.         -   Axillary cavity.—Wanting.         -   Seed Cells.—Walls thin, tough, length 17 mm, width 6 mm.         -   Longitudinal section.—Broadly ovate. -   Seeds:     -   -   Number perfect.—8 to 12.         -   Number in one cell.—2 to 4.         -   Length.—8 mm.         -   Breadth.—5 mm.         -   Form.—Obtuse, non-tufted.         -   Color.—Fan 4, Grayed-Orange, 178 A. -   Stem:     -   -   Length.—30 mm.         -   Width.—2 to 4 mm.         -   Color.—Grayed Red 178 A. -   Use: Processing, fresh market, dessert. -   Shipping quality: Good, subject to stem puncture. -   Keeping quality: Excellent, 90 to 120 days in common storage, 6     months in controlled atmosphere storage. -   Tree winter hardiness: Above average for an apple variety. Tree is     hardy to −20° to −35° F. -   Bud winter hardiness: −15° to −20° F., depending on the stage of     development of the bud. -   Drought tolerance: Average for an apple variety. Normal requirements     average ½″ of rain per week. Severe drought adversely affects fruit     size and quality. -   Disease resistance: Susceptible to fire blight (Erwinia amylovora)     and other bacterial diseases. Moderately susceptible to apple scab     (Venturia inaequalis), powdery mildew (Podosphaera leucotricha), and     other fungal diseases. 

1. A new and distinct variety of apple tree, Malus domestics, substantially as herein shown and described. 